Malicious PDF — malware analysis report

Static analysis result for SHA-256 e692090aaa65f4a1…

MALICIOUS

PDF

77.6 KB Created: 2021-01-30 06:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ad0cc693dc2d7751d892184dc7d040dd SHA-1: cec91f275228d794448174056ac6cc16e3bcf945 SHA-256: e692090aaa65f4a192a5b0971293f81fdee97a8686830713114273441a50f065
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafficel.ru/wb?keyword=worst%20game%20in%20the%20world%202018 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453719/normal_6006ea50b91db.pdfIn PDF document text
    • https://gamekesilib.weebly.com/uploads/1/3/4/8/134892139/muxidug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484995/normal_5fe2076f54cd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365583/normal_5fe26b8f69f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469101/normal_5fed3592113fb.pdfIn PDF document text
    • http://xuzevofut.22web.org/french_direct_indirect_object_pronoun_worksheets.pdfIn PDF document text
    • http://xevoxisukima.22web.org/55839581414.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_6007288cd94a9.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/1629605.pdfIn PDF document text
    • http://gisaxisiburu.66ghz.com/bivelinegezolaxeto.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/37897987858.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/english_azeri_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/tosop.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/wuwezojetujidetija.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/less_accumulated_depreciation_in_balance_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/27804336732.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/86274790971.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/aha_heart_failure_guidelines_2017.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f32f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32F 5864 bytes
SHA-256: 2c348a38938256ffd9167dd11148a3507415e3033165b0ee811e4c97baa077ac
font_01_sfnt_off00010715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10715 10164 bytes
SHA-256: 54b06e9752644dc2f717227c80d0d716ae1495f970748ec2a10ed445591b4e25

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